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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||180/305 ; 180/307 ; 180/308 ; 180/063 ; 180/417 ; 180/421 ; 180/422|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 16 인용 특허 : 5|
A method of controlling a vehicle hydraulic drive system of the type including a plurality of fluid pressure actuated wheel motors (13,15) connected in a parallel circuit with a source (17) of pressure. A flow restrictor valve (65) is disposed in a downstream conduit (27) of each of the wheel motors (13,15). The method involves determining the theoretical fluid flow for each motor, the actual fluid flow through each motor, and generating an error signal (107) which is then used to bias the restrictor valve (65) toward a flow restriction position. The dis...
[ What is claimed is:] [8.] A vehicle hydraulic drive system for driving a pair of driven wheels of a steerable vehicle, said drive system being of the type comprising a source of pressurized fluid, and a fluid pressure actuated motor operable to drive each of said driven wheels at varying speeds in response to varying rates of fluid flow to said motor from said fluid source, said motors being connected in a parallel circuit with said fluid source; a source of control fluid pressure; each of said motors including an inlet conduit disposed upstream of sai...